13889717 has 2 divisors, whose sum is σ = 13889718. Its totient is φ = 13889716.

The previous prime is 13889713. The next prime is 13889737. The reversal of 13889717 is 71798831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 1223236 = 3559^2 + 1106^2 .

It is a cyclic number.

It is not a de Polignac number, because 13889717 - 2² = 13889713 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13889713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944858 + 6944859.

It is an arithmetic number, because the mean of its divisors is an integer number (6944859).

Almost surely, 2^13889717 is an apocalyptic number.

It is an amenable number.

13889717 is a deficient number, since it is larger than the sum of its proper divisors (1).

13889717 is an equidigital number, since it uses as much as digits as its factorization.

13889717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 44.

The square root of 13889717 is about 3726.8910636078. The cubic root of 13889717 is about 240.3797056612.

The spelling of 13889717 in words is "thirteen million, eight hundred eighty-nine thousand, seven hundred seventeen".